YKQ-SB Pressure Valve — Dual-Line End-of-Line Monitor
The YKQ-SB pressure valve mounts at the end of the main pipeline in centralized dual-line grease plants. It monitors and limits line pressure in the 10–40 MPa range, giving operators dual pressure gauges and an indicator pin for quick visual confirmation that each half-cycle reached set pressure—supporting safe operation of BS-B pump stations and downstream metering blocks.
Adjustable range: 10 MPa to 40 MPa. Supply: AC 220 V typical for integrated monitoring functions (confirm Hz on order). Used with reversing valves such as SA-V or DR45 on the same dual-line architecture—not for single-line progressive chains (DJF1000).
Hub: dual-line lubrication systems · grease pump · VSG · ZVB.
- Parameter
YKQ-SB Summary
| Parameter | Specification |
|---|---|
| Adjustable pressure | 10–40 MPa |
| Operating voltage | AC 220 V |
| Pressure gauges | Two integrated gauges (Line A / Line B monitoring) |
| Indicator pin | Visual trip when set pressure reached |
| Typical mount | End of main dual-line header |
| Lubricant | Centralized grease (NLGI systems) |
Role vs Reversing Valve
| Component | Function |
|---|---|
| YKQ-SB (this page) | End-of-line pressure monitor / limit; gauges + indicator pin |
| SA-V | Motor-driven line reversal at header endpoint |
| DR45 | Hydraulic automatic change-over (500–3500 psi class) |
| BS-B pump | Central 40 MPa supply station |
Pressure Adjustment Procedure
- Lock out pump; relieve lines per plant LOTO.
- Loosen upper lock nut on adjusting screw.
- Turn screw plug to desired set pressure within 10–40 MPa band.
- Re-tighten lock nut to secure setting.
- Run pump; verify indicator pin and both gauges during A/B cycles.
Key Features
- 10–40 MPa adjustable span for steel-mill and mining dual-line classes
- Dual gauges — compare A/B header pressure without extra ports
- Indicator pin — visual cycle confirm without staring at gauges
- 220 V AC — common plant power for monitor circuit
Applications
Related Product
Why End-of-Line Pressure Monitoring Matters
On long dual-line headers, a blocked metering block or crushed hose can prevent one line from reaching working pressure. Without endpoint feedback, the pump may run indefinitely while bearings starve. YKQ-SB gives maintenance a local pressure snapshot and pin indication that the active line completed its half-cycle—complementing PLC timers on the lubrication controller.
Commissioning with BS-B + SA-V / DR45
- Set YKQ-SB below pump relief but above minimum required to shift SA-V or DR45.
- Confirm both gauges rise alternately each reversal.
- If pin never trips, check for open leak on inactive line or undersized pump (discharge class).
- Document set MPa on lubrication plate at skid.
Troubleshooting
| Symptom | Cause | Action |
|---|---|---|
| Gauge never rises | Blocked line, empty tank, pump fault | Trace main A/B; refill; service pump |
| Leak at valve | Set pressure too close to operating pressure; dirty seat | Adjust margin; clean/replace seat |
| Pin stuck | Contamination, over-tight adjustment | Service indicator; reset within range |
| One gauge always low | Partial blockage on that header half | Isolate zone; clear block |
Before you buy: read our grease fitting types guide.
Monitors and controls line pressure (10–40 MPa) at the end of dual-line grease headers—preventing overpressure and confirming cycle completion.
Loosen upper lock nut, adjust screw plug, re-lock nut; verify with gauges under controlled run.
Typically at the end of the main pipeline in centralized dual-line systems.
AC 220 V standard—confirm frequency and control wiring on quotation.
YKQ-SB emphasizes end-of-line monitoring/limiting with gauges; DR45 is automatic reversing change-over—often used together on large plants.
Optimized for grease centralized systems; other fluids require engineering review.
Check operating pressure vs setpoint, seat condition, and installation torque—same principles as DR45 relief leaks.
Use integrated gauges and indicator pin; tie optional switch contacts to PLC for missed-cycle alarm.